Company lists · Data refreshed September 2026

Top 24 Infrastructure design companies based in Baton Rouge, United States

RevenueBase identified 32 infrastructure design companies headquartered in Baton Rouge, United States as of September 2026 and tracks 6,141 professional contacts across them, including 1,713 with verified work emails. Houston is the largest hub.

This list covers infrastructure design companies headquartered in Baton Rouge, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review
32Companies
6,141Contacts tracked
1,713Verified emails
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The 24 largest infrastructure design companies based in Baton Rouge, United States

Ranked by team size
Top 24 of 32 infrastructure design companies based in Baton Rouge, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure design companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 20261,001-5,0002,639 contacts →

Indirect evidence

“APTIM enhances the quality of the environment, wellbeing of people, resilience of communities, and opportunity for employees to make a difference, not just a living.”

Source: RevenueBase Database · checked Sep 20, 2026
2Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 2026n/a2,232 contacts →

Indirect evidence

“Providence is an employee-owned engineering and environmental consulting firm.”

Source: RevenueBase Database · checked Sep 20, 2026
3Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202651-200305 contacts →

Indirect evidence

“CSRS was acquired by Westwood Professional Services on June 30, 2025.”

Source: RevenueBase Database · checked Sep 20, 2026
4Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202610001+299 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 20, 2026
5Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202651-200134 contacts →

Indirect evidence

“Established in 1986, GEC is a Louisiana-based engineering firm providing complete and proficient services from planning to implementation for private and public clients.”

Source: RevenueBase Database · checked Sep 20, 2026
6Partial evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 2026201-500122 contacts →

Partial evidence

“Wink Engineering, LLC is a professional consulting firm which provides engineering and design to a diversified clientele, specializing in services to the industrial sector.”

Source: RevenueBase Database · checked Sep 20, 2026
7Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202651-20093 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 20, 2026
8Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5061 contacts →

Indirect evidence

“Founded in 1953, SJB Group has evolved into one of the most respected and diversified firms in its class separating itself from competitors through its personnel, breadth of…”

Source: RevenueBase Database · checked Sep 20, 2026
9Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202651-20051 contacts →

Indirect evidence

“JB James Construction, LLC is a full-service heavy highway and bridge contractor based in Baton Rouge, Louisiana.”

Source: RevenueBase Database · checked Sep 20, 2026
10Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202651-20030 contacts →

Indirect evidence

“GOTECH, Inc, a professional engineering and consulting firm, was established in 1981 by Rhaoul A.”

Source: RevenueBase Database · checked Sep 20, 2026
11Partial evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5025 contacts →

Partial evidence

“Bonton Associates engineers long-term solutions to public infrastructure challenges.”

Source: RevenueBase Database · checked Sep 20, 2026
12Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5023 contacts →

Indirect evidence

“PEC is a multi-disciplined consulting firm with engineers and other specialists experienced in the following areas, civil, sanitary, transportation, mechanical, recreational…”

Source: RevenueBase Database · checked Sep 20, 2026
13Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5022 contacts →

Indirect evidence

“Sigma Consulting Group, Inc.”

Source: RevenueBase Database · checked Sep 20, 2026
14Partial evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5013 contacts →

Partial evidence

“At Timbalier Resources, we are your strategic partner in large-scale infrastructure projects.”

Source: RevenueBase Database · checked Sep 20, 2026
15Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5012 contacts →

Indirect evidence

“With a combined 70 plus years of experience, Southeast Engineers has become a market leader in a wide range of engineering services.”

Source: RevenueBase Database · checked Sep 20, 2026
16Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5011 contacts →

Indirect evidence

“Owen and White, Inc.”

Source: RevenueBase Database · checked Sep 20, 2026
17Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-5010 contacts →

Indirect evidence

“VECTURA Consulting Services, LLC was founded by two veteran Louisiana transportation engineers who have unique expertise in providing transportation engineering services from the…”

Source: RevenueBase Database · checked Sep 20, 2026
18Partial evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 20261-108 contacts →

Partial evidence

“Plus one design & construction was started with the core belief that design & construction should work together to offer clients a holistic approach.”

Source: RevenueBase Database · checked Sep 20, 2026
19Partial evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-507 contacts →

Partial evidence

“Civil Solutions Consulting Group is a civil engineering and surveying firm that assists governmental agencies, developers, and architecture firms with the planning, design, and…”

Source: RevenueBase Database · checked Sep 20, 2026
20Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 202611-505 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 20, 2026
21Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 20261-102 contacts →

Indirect evidence

“Founded in 1986, Compliance Consultants, Inc,(CCI) is a civil/environmental engineering and consulting firm that provides specialized services to a broad range of clients.”

Source: RevenueBase Database · checked Sep 20, 2026
22Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Svaapta Group was founded with the objective of providing transportation-oriented consulting engineering services to both the public and private sectors.”

Source: RevenueBase Database · checked Sep 20, 2026
23Indirect evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“ICS specializes in project management consulting.”

Source: RevenueBase Database · checked Sep 20, 2026
24Partial evidenceBaton Rouge, LA, United StatesHQ checked Sep 20, 20261-101 contacts →

Partial evidence

“Resource Consulting is a full service civil engineering firm that combines Surveys, Environmental, Site Investigation Planning, Site Design, Approvals and Construction…”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 24 of 32 infrastructure design companies based in Baton Rouge, United States

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Infrastructure design companies based in Baton Rouge, United States at a glance

As of Sep 20, 2026
27.9%Verified-email coverage
191.9Average contacts per company
11-50Median size (employees)
581.2%Largest-city concentration · Houston
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
9
11-50
14
51-200
6
201-500
1
1,001-5,000
1
10001+
1

Email recency for this list is measured across the whole United States list rather than for Baton Rouge, so it is reported there. Company counts and contact totals on this page are exact for Baton Rouge, over 32 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among infrastructure design companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Baton Rouge, United States whose own description of what they do matches “infrastructure design companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names infrastructure design companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among infrastructure design companies, and records with no verified work email. Companies headquartered outside Baton Rouge are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 1,713 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Infrastructure design companies by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names infrastructure design companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many infrastructure design companies are there based in Baton Rouge, United States?

RevenueBase identified 32 infrastructure design companies headquartered in Baton Rouge, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

APTIM, headquartered in Baton Rouge, tops this list with the largest team on record.

Which city has the most infrastructure design companies?

Houston leads with 186 headquartered companies, followed by New York (131) and Chicago (104).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,713 verified decision-maker contacts tracked across these 32 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.